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Thread: No idea what this is.....

  1. #1
    Join Date
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    Question No idea what this is.....

    Anyone have any ideas on what this is? I found it after I installed my ZKW Ellipsoids and HIDs. It just kind of appeared magically in the engine bay It doesn't seem to be too important as the car still drives wonderfully and no errors reported by computer. Any inputs or insights would be greatly appreciated.


    TIA,
    Slagboy.
    Attached Images Attached Images
    Past: 1998 E36 M3 / 2001 E39 525I
    Present: Non-BMW
    Future: E39 540i6 or M5

  2. #2
    Join Date
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    And one more shot...
    Attached Images Attached Images
    Past: 1998 E36 M3 / 2001 E39 525I
    Present: Non-BMW
    Future: E39 540i6 or M5

  3. #3
    Join Date
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    Baltimore, MD
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    I think its the external temp sensor

    mines is dangling down behind my headlights. Does anyone know if its supposed to be secured somewhere?

    Jim Eagan
    97 328is 64k:

  4. #4
    Join Date
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    the external temp sensor is located in the driver's side brake duct, the passenger side contains the sensor for those cars equipped with headlight washers.
    Let me get this straight... You are swapping out parts designed by hundreds of engineers that get paid thousands of dollars for something you bought at Pep Boys because your buddy who doesn't have a job told you it was 'better'?!?

  5. #5
    Join Date
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    Great! It means that I just need to find a good place to secure it down.

    Thanks for the quick info fellow BF.com members! :
    Slagboy.
    Past: 1998 E36 M3 / 2001 E39 525I
    Present: Non-BMW
    Future: E39 540i6 or M5

  6. #6
    Join Date
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    Originally posted by Kevlar
    the external temp sensor is located in the driver's side brake duct, the passenger side contains the sensor for those cars equipped with headlight washers.
    Are you sure? I thought that it was for the windshield washer nozzles. Supposedly, they only heat when it's below a certain temperature. :

  7. #7
    Join Date
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    99 M3, 04 Kawi ZX6RR
    There is a hole in the brake duct on the passenger side. Thats where it goes.

  8. #8
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    '95 Avus blue M3
    The hole in the side of the passenger side brake duct is where it goes. Take off the porkchop (if you have it) and just snap it in place.

  9. #9
    Join Date
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    Originally posted by Kevlar
    the external temp sensor is located in the driver's side brake duct, the passenger side contains the sensor for those cars equipped with headlight washers.
    I don't think that is true since I also have that sensor installed on my passenger side brake duct and I don't have headlight washers.
    James
    2005 Imola Red M3 - VF Stage I Supercharged Street/Track Car
    E46 M3 VF Engineering Stage I Supercharger DIY

  10. #10
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    I don't have the headlight washers either, but I do have the sensor. Well actually only half of the sensor. On a cross country trip, my porkchop and brake duct flew off...the sensor drug for about 700 miles.

  11. #11
    Join Date
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    ?
    Yeah, that is the the temp sensor for the windshield washer noozle heater. There is a bracket on the brake duct to snap it in.

  12. #12
    Join Date
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    Thanks for the further replies. I'll see if I can't squeeze in some time to investigate and check the brake ducts. I'll let you guys know the results.

    Thanks again!
    Slagboy
    Past: 1998 E36 M3 / 2001 E39 525I
    Present: Non-BMW
    Future: E39 540i6 or M5

  13. #13
    Join Date
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    E36 M3 Evolution, Me
    Originally posted by r6e36
    Yeah, that is the the temp sensor for the windshield washer noozle heater. There is a bracket on the brake duct to snap it in.
    This is right. The sensor in the left brake duct (looking from rear of car-your drivers side) is external temp for the display.

    BTW easiest way to put the sensor back home is flick out your right hand foglight. (looking from rear of the car-passenger side) Look through the foglight void and the hole in which it lives (side of brake duct) should be right in front of you.


    Rory

  14. #14
    Join Date
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    Wait a minute...Arent we talking about two different things here? In my driver side brake duct, theres a hole, into which gets mounted the external temp sensor, from the fog light side...Its a long inch and a halfish dark gray plastic probe, which you should be able to feel if you stick your hand into the driver side brake duct...As you look at it head on, its on your right side of the inside of teh duct.l

    But whats the pic here is showing is a round disk. So thats clearly not the external air temp sensor, at least, not the one that goes in the brake duct...NOw, isnt it possible that this disk sensor is for the windsheild washer nozzle? Also, our mirrors are supposed to be heated, depending on ambient temps...Although mine have never worked properly, couldnt this disk be for that? None of us have the headlight washers, as they were not US Spec items, I believe, but I suppose its possible that this disk could be a vestigal sensor for that function as well.
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